Module: ASpaceImport::XML::DOM

Included in:
EACConverter, MarcXMLAuthAgentConverter, MarcXMLBibConverter
Defined in:
backend/app/converters/lib/xml_dom.rb

Defined Under Namespace

Modules: ClassMethods Classes: Config

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'backend/app/converters/lib/xml_dom.rb', line 47

def self.included(base)
  base.extend(ClassMethods)
end

Instance Method Details

#config ⇒ Object 



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# File 'backend/app/converters/lib/xml_dom.rb', line 52

def config
  self.class.config
end

#object(path, defn) ⇒ Object 



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# File 'backend/app/converters/lib/xml_dom.rb', line 85

def object(path, defn)
  @context ||= [@doc]
  @context.last.xpath(path).each do |node|
    @context << node
    obj = ASpaceImport::JSONModel(defn[:obj]).new
    @batch << obj
    defn[:map].each do |key, defn|
      process_field(obj, key, defn)
    end
    if defn[:defaults]
      defn[:defaults].each do |key, val|
        if obj[key].nil?
          obj[key] = val
        end
      end
    end
    yield obj if block_given?
    @context.pop
  end
  if @context.length == 1
    @batch.flush
  end
end

#process_field(obj, key, value) ⇒ Object 



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# File 'backend/app/converters/lib/xml_dom.rb', line 110

def process_field(obj, key, value)
  raise "Received a non-string mapping: #{key}" unless key.is_a?(String)

  # xpath => Array
  if value.is_a?(Array)
    value.each do |i|
      process_field(obj, key, i)
    end
  # xpath => :field_name
  elsif value.is_a?(Symbol)
    @context.last.xpath(key).each do |node|
      if obj[value].is_a?(Array)
        obj[value] << node.inner_text
      else
        obj[value] = node.inner_text
      end
    end
  # xpath => Proc
  elsif value.is_a?(Proc)
    @context.last.xpath(key).each do |node|
      value.call(obj, node)
    end
  # xpath => sub record definition
  elsif value.is_a?(Hash)
    object(key, value) do |sub_obj|
      if value[:rel].is_a?(Proc)
        value[:rel].call(obj, sub_obj)
      else
        property_def = obj.class.schema['properties'][value[:rel].to_s]
        if property_def.nil?
          raise Converter::ConverterMappingError.new("The converter maps '#{key}' to a bad target (property '#{value[:rel]}' on record_type '#{obj.jsonmodel_type}').")
        end

        property_type = ASpaceImport::Utils.get_property_type(property_def)
        filtered_value = ASpaceImport::Utils.value_filter(property_type[0]).call(sub_obj)
        obj[value[:rel]] << filtered_value
      end
    end

  else
    raise Converter::ConverterMappingError.new("Bad types in mapping: (#{key.class.name}) => (#{value.class.name})")
  end
end

#run ⇒ Object 



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# File 'backend/app/converters/lib/xml_dom.rb', line 57

def run
  if config.doc_frag_nodes.empty?
    @doc = Nokogiri::XML::Document.parse(IO.read(@input_file))
    @doc.remove_namespaces!

    config.mappings.each do |path, defn|
      object(path, defn)
    end
  else
    parser = Saxerator.parser(IO.read(@input_file)) do |config|
      config.output_type = :xml
      config.ignore_namespaces!
      config.strip_namespaces!
    end

    config.doc_frag_nodes.each do |break_node|
      parser.for_tag(break_node).each do |xml|
        @doc = xml
        @context = [@doc]
        config.mappings.each do |path, defn|
          object(path, defn)
        end
      end
    end
  end
end